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Old 02-24-2011, 07:03 PM   #1
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Plank sub-floor - replace or overlay


I am going to be redoing a floor in my house. The house is 25' wide, with an i-beam down the middle. The joists are 2x8's, 16" on center, the span is about 12 1/2' wide. I have plank sub-floor, 3/4" deep, about 8" wide that are installed at a 45 degree angle. The house is about 50 years old (1960 construction).

The floors are bouncy, and the planks are nailed in, so they squeak pretty good to. I am redoing a bedroom floor, and wanted to beef up the floor. Last year, I did a bathroom. I sistered the joists, and put down 3/4" T & G plywood. The sub-floor was replaced because the old one was rotting out. That floor is solid.

I plan on sistering the joists to stiffen the floor under the bedroom, but do I need to replace the plank sub-floor? Could I just screw it down? I know I could overlay with plywood, but then the floor height would not match in the hallway.

Any advice would be greatly appreciated.




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Old 02-24-2011, 07:09 PM   #2
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Screwing it existing planks down will be fine----Mike----


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Old 02-25-2011, 08:35 AM   #3
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I don't see any reason to replace the planks if they're in good shape. Screw them down to minimize the squeaking and call it a day.
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